You are asked to provide the EVM version the contract uses during the verification process. If the bytecode does not match the version, we try to verify using the latest EVM version (currently London).
For more information, see the Solidity docs on specifying the EVM version when compiling a contract. Note that backward compatibility is not guaranteed between each version.
Name | Date | Mainnet Block # | Relevant changes / opcode specs | EIP details |
---|---|---|---|---|
Homestead | 14 Mar 2016 | 1,150,000 | Oldest version | http://eips.ethereum.org/EIPS/eip-606 |
Tangerine Whistle | 18 Oct 2016 | 2,463,000 | Gas cost to access other accounts increased, impacts gas estimation and optimization. |
http://eips.ethereum.org/EIPS/eip-608 |
Spurious Dragon | 22 Nov 2016 | 2,675,000 | Gas cost for the exp opcode increased, impacts gas estimation and optimization. |
http://eips.ethereum.org/EIPS/eip-607 |
Byzantium | 16 Oct 2017 | 4,370,000 | Opcodes |
http://eips.ethereum.org/EIPS/eip-609 |
Constantinople / Petersburg | 28 Feb 2019 | 7,280,000 | Opcodes |
http://eips.ethereum.org/EIPS/eip-1013 |
Istanbul | 08 Dec 2019 | 9,069,000 | Opcodes chainid and selfbalance are available in assembly. |
https://eips.ethereum.org/EIPS/eip-1679 |
Berlin | 14 Apr 2021 | 12,244,000 | Gas costs for SLOAD , *CALL , BALANCE , EXT* and SELFDESTRUCT increased. The compiler assumes cold gas costs for such operations. This is relevant for gas estimation and the optimizer. |
https://eips.ethereum.org/EIPS/eip-2070 |
London | 05 Aug 2021 | 12,965,000 | The block’s base fee (EIP-3198 and EIP-1559) can be accessed via the global block.basefee or basefee() in inline assembly. |
|
Arrow Glacier* | 09 Aug 2021 | 13,773,000 | Delays the difficulty bomb until June 2022. | ****https://eips.ethereum.org/EIPS/eip-4345 |
Gray Glacier* | 30 June 2022 | 15,050,000 | Delays the difficulty bomb by an additional 3 months to September 2022. | https://eips.ethereum.org/EIPS/eip-5133 |
*Does not impact version for contract verification.